#include <iostream>
#include <string>
#include <algorithm>

int n;
std::string s;

int max_notation()
{
	int i = 0, j = 1;

}

int mai()
{
	std::ios::sync_with_stdio(false);
	int T;
	std::cin >> T;
	while (T--) {
		std::cin >> n;
		std::cin >> s;
		int tc = max_notation();
		std::reverse(s.begin(), s.end());
		int tuc = max_notation();
	}
}
